Structure
Verb[たら]+ いい
Verb[ば]+ いい
Verb + と + いい
[い]Adjective[た]+ ら+ いい
[い]Adjective[い]+ ければ+ いい
[い]Adjective + と + いい
[な]Adjective + だった + ら+ いい
[な]Adjective + であれば+ いい
[な]Adjective + だ + といい
Details
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Standard
About たらいい・といい
When any of the conjunction particles that carry the meaning of 'if' (たら, ば, or と) are paired with the い-Adjective, いい, they will express the desired result of the speaker. These all translate to 'it would be nice if (A)'. However, the speaker's level of certainty about the result being 'good' will change slightly, depending on the particle.
ばいい - Hypothetically, (A) happening would be good. (Lowest strength/certainty)
たらいい - When (A) happens, it will be good. (Medium strength/certainty)
といい - The result of (A) is good. (Strongest/most certain)
To use ば, たら, or といい, first add the conjunction particle to the end of any verb, and then attach the い-Adjective, いい.
Synonyms
ばよかった
Should have, I wish, It would have been better to
Not studied yet
たほうがいい
It'd be better to, Should do
Not studied yet
といい
I hope, I wish, You should, It would be good
Not studied yet
はずだ
Bound to (be), Expected to (be), Should be (able)
Not studied yet
ばいい
Can, Should, It'd be good if
Not studied yet
たらどう
Why don't you...?, What if you did...?
Not studied yet
Antonyms
Examples
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毎日、好きな番組が見れたらいい。
It would be nice if I could watch my favorite TV show everyday.
自由にしたらいいでしょう。
It would be nice to just do whatever you want, wouldn't it?
明日と明後日も晴れるといいですね。
It would be nice if the weather was clear tomorrow and the day after, wouldn't it?
文句を言わないで!どうしたらいいのか教えてよ。
Stop complaining! Tell me what would be good to do!
僕もイルカみたいに上手に泳げたらいいのに。
I wish I could swim well like a dolphin. (it would be good if...)
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Online
Difference between ”conditional” いい and 方がいい
JStackExchange
たらいい・といい
JapaneseTest4You
General conditionals
Tae Kim
Offline
Tobira
Page 122
みんなの日本語 II
Page 12 [CH 26]
みんなの日本語 II
Page 66 [CH 35]
Tae Kim's Japanese Grammar Guide
Page 139
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